巴西近年来拖拉机产品的生产和市场走势浅析

0概况巴西联邦共和国,位于南美洲东部.全国总面积851.20万km2,约占南美洲总面积的一半,是南美洲面积最大的国家。总人口为18065.4万人(2004年),也是南美洲人口最多的一个国家,其中55%为白种人,38%为混血种人,葡萄牙语为其官方语言,     

金亿发力小麦机主推新款占市场

在一跃成为玉米多功能收获机销售量全国领先和政府补贴台数领先的企业之后,2008年,山东金亿机械制造有限公司(以下简称"金亿公司")欲继续发力于自走式小麦收获机市场.     

关于发展水稻收获机械化的思考

1.选好机型 目前,水稻联合收割机机型很多,应按先进适用原则,选择性能好、效率高、适应性强、可靠性好、价格合理的机型.2006年在江西省吉水县推广的机型有丹霞4L-0.5、柳林-160、三联-160和碧浪4L-1.0等.经使用,丹霞4L-0.5型具有体积小、转移方便、适用于山区和种粮大户的特点,每台每季可作业7hm2以上,农民反映较好.柳林-160型具有质量好、功效高、故障少的特点,适应于平原大田块和为其他农户服务用,每台每季作业13hm2以上,深受机手和农民欢迎.     

一次突击的机耕行动——1954年太原至文水的远征

紧急受命 1954年,山西省在文水县南安乡谢家寨村建起了山西省碱地改良站,前苏联专家在视察该改良站土地后提出:对留茬的玉米地,必须先用拖拉机进行深耕(耕深22cm),等过了冬季,才能检验出防治盐碱的效果.在当时,前苏联专家的建议就是最权威的命令,山西省农业厅的领导不敢怠慢,赶紧组织人手、分配任务,由于条件有限,整个晋中地区只有榆次县张庆乡有几台拖拉机,在汾河岸以西还没有一台农业机械.     

农业装备盛会多彩妆点中原

(本刊讯)天上飞行助威、地上热歌劲舞。10月26日上午,2007年全国农机产品订货交易会暨第十一届中国国际农业机械展览会开幕式在郑州国际会展中心     

Audi（奥迪A6）MOST-BUS结构和环型断裂诊断法的分析

介绍了Audi(奥迪A6)MOST-BUS结构,传输和工作过程的特点,针对MOST-BUS结构,提出MOST-BUS系统故障诊断的基本思路和环型断裂诊断法.     

精确称量配料机设计

现阶段,我国制药行业星罗棋布,生产水平良莠不齐,持有生产许可证的生产企业已达6000多家,但其中90%为中小型企业,规模小,技术落后,设备陈旧,产品质量安全亦无保障.针对当前国际上全自动配料设备价格相当昂贵、国内目前同型设备短缺及我国中小企业的实际生产状况,设计并制造了自动控制配料机,该机通过PLC编程实现药品配方原料成分识别、料斗自动旋转、制动和成份称重后的自动倒料过程.介绍了配料机的组成、工作原理以及结构设计过程.     

解决联合收割机籽粒损失问题的探讨

随着浦城县农村经济的快速发展,联合收割机的使用越来越普遍,作为一种致富的工具,联合收割机越来越受到用户的重视和欢迎。但用户在使用联合收割机过程中时常反映"跑粮"(籽粒损失)问题。     

货车挂断高压线供电职工抢修忙

2006年8月28日20时10分,一辆装有泥土的翻斗汽车在安徽省宿松某开发区工地卸土时,不慎将一条10 kV高压线挂断,致使县城西南方上千户居民和单位突然断电.由于高压线采用的是绝缘线,车主才幸免于难.     

豪丰印象

5月下旬,正是小麦夏收时节,笔者如约来到位于河南省许昌县张潘镇的河南豪丰机械制造有限公司.10多年前我曾来过当时还是许昌县农机总厂的这家企业,当年的厂长,现任公司董事长刘少林早已等在办公楼前,一口纯正的河南腔,还是那个大嗓门,虽然岁月的沧桑给他增添了些许皱纹,但眼前这个一米八的中原汉子依旧那么豪爽,那么开朗,竟使人看不出多少岁月磨砺的痕迹.在寒暄后的访谈和参观中,一个现代农机具生产企业和它的当家人的形象逐渐在我的脑海中清晰起来.     

Overland water and salt flows in a set of rice paddies

Cultivation of paddy rice in semiarid areas of the world faces problems related to water scarcity. This paper aims at characterizing water use in a set of paddies located in the central Ebro basin of Spain using experimentation and computer simulation. A commercial field with six interconnected paddies, with a total area of 5.31 ha, was instrumented to measure discharge and water quality at the inflow and at the runoff outlet. The soil was classified as a Typic Calcixerept, and was characterized by a mild salinity (2.5 dS m⁻¹) and an infiltration rate of 5.8 mm day⁻¹. The evolution of flow depth at all paddies was recorded. Data from the 2002 rice-growing season was elaborated using a mass balance approach to estimate the infiltration rate and the evolution of discharge between paddies. Seasonal crop evapotranspiration, estimated with the surface renewal method, was 731 mm (5.1 mm day⁻¹), very similar to that of other summer cereals grown in the area, like corn. The irrigation input was 1874 mm, deep percolation was 830 mm and surface runoff was 372 mm. Irrigation efficiency was estimated as 41%. The quality of surface runoff water was slightly degraded due to evapoconcentration and to the contact with the soil. During the period 2001–2003, the electrical conductivity of surface runoff water was 54% higher than that of irrigation water. However, the runoff water was suitable for irrigation. A mechanistic mass balance model of inter-paddy water flow permitted to conclude that improvements in irrigation efficiency cannot be easily obtained in the experimental conditions. Since deep percolation losses more than double surface runoff losses, a reduction in irrigation discharge would not have much room for efficiency improvement. Simulations also showed that rice irrigation performance was not negatively affected by the fluctuating inflow hydrograph. These hydrographs are typical of turnouts located at the tail end of tertiary irrigation ditches. In fact, these are the sites where rice has been historically cultivated in the study area, since local soils are often saline-sodic and can only grow paddy rice taking advantage of the low salinity of the irrigation water. The low infiltration rate characteristic of these saline-sodic soils (an experimental value of 3.2 mm day⁻¹ was obtained) combined with a reduced irrigation discharge resulted in a simulated irrigation efficiency of 60%. Paddy rice irrigation efficiency can attain reasonable values in the local saline-sodic soils, where the infiltration rate is clearly smaller than the average daily rice evapotranspiration.     

瓦房店市水果生产标准化发展研究

瓦房店市是我国重要的水果生产基地,在国内水果生产领域占有重要地位。随着水果市场化的不断深入,如何满足和适应国内外市场需求成为瓦房店市水果生产的关键问题。从瓦房店市水果生产实际出发,阐述了实施水果生产标准化的必要性,提出了发展水果生产标准化的具体措施。     

金谷子耐旱TG118引种试种及推广应用

对引进的谷子新品种金谷子耐旱TG118进行品种比较试验和多点试种。结果表明：该品种抗旱、耐瘠、适应性强,稳产、高产、抗病抗风抗倒伏强,品质优良,粮草兼用,种植简单,省工易管;一般产量在6000kg/hm2以上,比当地主栽品种增产20%以上。最高产量达9450kg/hm2,适于在辽西北地区推广应用。     

对《种子法》存在问题的探讨

《种子法》是我国种植业第一部法律。自实施以来,为依法加强种子管理提供了有力的法律支撑,促进我国种子产业发生翻天覆地的变化。但随着依法管理工作的深入和种子产业的快速发展,《种子法》及配套规章的一些问题逐步显现出来。对《种子法》及配套规章存在的问题进行深入分析,对需要进一步补充的章节以及需要调整的内容进行深入探讨,以求更加完善和明确。     

Review of the Egyptian experience in implementing land drainage projects

About 30 years have passed since the Government of Egypt embarked on implementing a series of large scale drainage projects. At present, about 3.8 million acres have been provided with drainage systems on the basis of systematic pre-drainage investigations and designs. The target is to provide drains in approximately 6.4 million acres in the Nile Valley and Delta.The implementation of the subsurface drainage system is carried out by the public sector and private contractors under direct supervision of governmental regional departments. The implementation process depends on many factors related to the drainage material, machinery, manpower, site requirements, farmers and organizations involved. Problems and constraints are sometimes challenging, however, the annual rate of implementation has gradually increased to 170,000 acre/year.This paper discusses the different aspects involved in the implementation process of drainage systems. The development in materials, machinery and construction technologies will be reviewed. Institutional and management factors are going to be also considered.     

和谐社会理论建设的几点哲学思考

在新世纪,面对机遇和挑战,党的十六大把“社会更加和谐”作为全面建设更高水平的小康社会的一个重要目标。中国人素有社会和谐的理想;西方人自古也向往社会和谐;借鉴东西方两种和谐社会思想的经验、教训,构建社会主义和谐社会理论。     

A European irrigation map for spatially distributed agricultural modelling

We present a pan-European irrigation map based on regional European statistics, a European land use map and a global irrigation map. The map provides spatial information on the distribution of irrigated areas per crop type which allows determining irrigated areas at the level of spatial modelling units. The map is a requirement for a European scale assessment of the impacts of irrigated agriculture on water resources based on spatially distributed modelling of crop growth and water balance. The irrigation map was compiled in a two step procedure. First, irrigated areas were distributed to potentially irrigated crops at a regional level (European statistical regions NUTS3), combining Farm Structure Survey (FSS) data on irrigated area, crop-specific irrigated area for crops whenever available, and total crop area. Second, crop-specific irrigated area was distributed within each statistical region based on the crop distribution given in our land use map. A global map of irrigated areas with a 5′ resolution was used to further constrain the distribution within each NUTS3 based on the density of irrigated areas. The constrained distribution of irrigated areas as taken from statistics to a high resolution dataset enables us to estimate irrigated areas for various spatial entities, including administrative, natural and artificial units, providing a reasonable input scenario for large-scale distributed modelling applications. The dataset bridges a gap between global datasets and detailed regional data on the distribution of irrigated areas and provides information for various assessments and modelling applications.     

粉质仪和拉伸仪在面粉生产中的应用

在介绍粉质仪和拉伸仪结构和原理的基础上,探讨了粉质曲线中吸水率、形成时间、稳定时间、弱化度和评价值等指标与面粉品质的关系,以及如何根据拉伸曲线中面团最大拉伸阻力、延伸度和拉伸曲线面积等指标来评价面团品质,并结合生产实际,概述了粉质仪和拉伸仪在面粉生产中的作用。     

农村信息化服务的现状及建设措施

分析当前我国农村信息化服务的现状,提出加强农村信息化服务的新举措。     

车辆ABS控制算法的研究及探讨

对现代汽车的ABS控制算法作了一些简单的介绍,同时指出了它们的一些缺陷,相应地提出了几种对ABS的其它控制方法并加以探讨,其中着重论述了ABS门限值控制算法中参考车速的确定方法和基于附着系数的控制算法。